JPS60259341A - Production instructing device - Google Patents

Abstract

PURPOSE:To prevent a workpiece from colliding against a reader to aim at saving labor in a workpiece transfer work or the like, by moving a reader for production instructing cards between its reading position and its passing position in synchronism with the transfer of the workpiece. CONSTITUTION:A card 7 is transmitted to a reader 13 preceding a workpiece, a cam follower 37 enters into an introduction port for a cam 9, and is guided by an inclined path to move downward. Since the cam follower 37 is secured to a rack 17, the rack 17 is also moved leftward. Due to movement of the rack 17 a pinion 15 is rotated clockwise to rotate the reader 13 upto a reading position (b) where data on the production instructing card 7 is read. Then, the cam follower 37 enters into an introduction port for a cam 11, and is guided by an inclined path so that the rack 17 is moved inward of a conveyor to rotate the pinion 15 counterclockwise. After the reader 13 is held at a retracting position (a), the workpiece on a slat conveyor is transferred. Accordingly, the workpiece is prevented from colliding with the reader 13.

Description

[Detailed Description of the Invention] [Field of Application] The present invention relates to a production instruction device, and in particular, to a production instruction device for assembling parts of a subsequent workpiece that is conveyed prior to a workpiece being conveyed by a conveyance means such as a belt conveyor. A production instruction card with information written on it is read by a card reader that can be moved between a card reading position close to the conveyance means and a retreat position evacuated from the conveyance means, and information is output according to the reading result. It is related to the device.

[Background of the invention]

Recently, with the aim of making efficient use of assembly lines, a production system has been adopted in which various types of workpieces are transported on the same assembly line and different parts are assembled onto each workpiece. In such a production system, if the worker judges the workpieces that are sequentially conveyed on the assembly line and selects the parts to be assembled accordingly, this not only increases the burden on the worker but also reduces the assembly time. Since mistakes may occur, a production instruction device is used that identifies the type of work being transported using an identification device and instructs the worker which parts to assemble by means of a lamp, voice, or the like.

In one example of this type of production instruction device, a resin production instruction card is perforated with information regarding assembly parts, and binary coded 10
In addition to being expressed in the form of decimal numbers, the information is also expressed in letters and figures. This production instruction card is conveyed along the belt conveyor in advance of the work conveyed by the belt conveyor, and the perforation information is read by a card reader at a predetermined position. Information regarding attached parts is outputted, for example, by voice. In addition, the production instruction card is held obliquely above the belt conveyor so that the worker can grasp information about the parts to be assembled by looking at the characters and figures on the production instruction card. makes it easier to see the cards.

Therefore, it is necessary to position the reading device above the belt conveyor to read the production instruction cards that are conveyed at an angle. However, if the reading device is left positioned above the belt conveyor in this way, Since the conveyed workpiece collides with the reading device, the reading device is rotatably held by a holding member and placed between the reading position above the belt conveyor and the retracted position from above the belt conveyor. It is possible to move `` manually. However, since this movement of the reading device is manually performed by the operator, there is a tendency for the workpiece to collide with the reading device due to the operator's carelessness.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems and provide a simple, low-cost production instruction device that moves a reading device between a reading position and a retreat position in synchronization with the conveyance of a workpiece. It is in.

[Structure of the invention]

In the production instruction device of the present invention, a first cam and a second cam are sequentially arranged in the conveying direction on a conveying means for conveying a workpiece, and a reading device is arranged to sequentially engage the first cam and the second cam. A mating cam follower is connected to a fixed driving means, and when the cam follower engages with the first cam, the reading device is driven to a reading position which is one thousandth away from the conveying means, and at that reading position it precedes the workpiece along the conveying means. When the cam follower engages with the second cam, the reader is driven to a retracted position from the transport means.

〔Example〕

1, 2 (B), 3 and 4 show an embodiment of the present invention, FIG. 1 being a plan view and FIG.
is a view taken from line AA in FIG. 1, and FIG. 3 is a left side view of FIG. 2 (Shu).

In FIG. 1, IA to IJ indicate each slat of the slat conveyor 1, each slat IA to IJ is moved in the direction of an arrow by a drive device (not shown), and a workpiece 3 is placed on the slat IF. ing. Slab 1-
As shown in Fig. 2 (A), a card holder 5 tilting upwards on the slat conveyor 1 is attached to the IB and 1 workpieces, and as shown in Fig. 2 (CB), a card holder 5 is installed to hold the production instruction card. 7 is held in the card holder 5. A card holder 5 is attached. Although cams 9 and 11 are the same cam, they are mounted on opposite sides, so as shown in FIG.
The cam grooves 90-92 and 100-102 defined by are symmetrical with respect to the line t1. - Also referring to FIG. 1, reference numeral 13 indicates a card reading rear part, which is rotatably attached to the slat conveyor 1. The card reading device 13 is connected via a holding member 21 to a drive device 19 having a binion 15 and a rack 17 as shown in FIGS. 1 and a reading position located above the slat conveyor 1 can be taken.

Referring to FIG. 3 and FIG. 2(4), a shaft 22 is pivotally supported by a conveyor frame 24, and a pinion 15 is mounted on this shaft 22. A holding member 21 is fixed to this pinion 15, and the reading device 13 can rotate according to the rotation of the pinion 15.

Here, the conveyor frame 24 has stoppers 25 and 27.
The position where the holding member 21 rotates counterclockwise and contacts the stopper 25 becomes the retracted position "A" of the reading device 13, and the holding member 21 rotates clockwise and contacts the stopper 27. The abutting position becomes the reading position "mouth" of the reading device 13.

A dovetail 17A is formed on the lower surface of the rack 17, and the dovetail 17A fits into a dovetail groove 29A formed in a guide member 29 provided on the conveyor frame 26. Therefore, the rack 17 is movable along the guide member 29.

A pinion 15 meshes with this rack 17. The rack 17 is disposed perpendicular to the moving direction of the slab conveyor 1''!, and a pin 35 is fitted into a boss 33 screwed onto the tip of the rack 17 on the conveyor side. A cam follower 37 is rotatably mounted.As best seen in FIG. When the cam 1 moves, the cam follower 37 enters into the cam groove of the cam 9.

Referring to FIG. 4, the cam 9 disposed in advance in the conveyance direction of the workpiece has two opposing cam surfaces 9.
Depending on the person, the cam follower introduction port 90 and its introduction port 90
A ramp 91 that guides the cam follower 37 moving outward perpendicular to the conveyor traveling direction, and a cam follower 3 that has been moved outward by the ramp 91.
A cam follower discharge port 92 is formed to discharge the cam 7 from the cam 9 in the same position. On the other hand, the cam follower 3 that has passed the cam 9 is attached to the cam 11 by the cam surface 11A.
7, a ramp 111 that guides the cam follower 37 moved to the outermost position by the cam 9 to the inside of the conveyor, that is, to a position before the cam follower 37 enters the cam 9; The cam follower 37, which was moved inward at path 111, is moved in the same position as the cam 1.
A cam follower discharge port 112 for discharging from the cam follower 1 is formed.

In the production instruction apparatus configured as described above, the reading device 13 swings between the reading position and the retracted position in the following manner.

As shown in FIG. 1, when the card 7 is conveyed toward the reading device 13 in advance of a work (not shown) following the work 3, the cam follower 37 first moves into the introduction port 90 of the cam 9.
The cam follower 37 moves downward in FIG. 4 while being guided by the ramp 91. Since the cam follower 37 is fixed to the rack 17, the rack 17 is also moved downward by the cam follower 37, in other words, to the outside of the conveyor perpendicular to the workpiece conveyance direction. The movement of the rack 17 causes the pinion 15 to move toward the shaft 2, as shown in FIG. 2 (4).
Rotate clockwise around 2. Then, in FIG. 4, when the cam follower 37 reaches position R inside the cam 9, the reading device 13 rotates to the reading position "mouth" in FIG. come into contact with. Even if the conveyor 1 further advances and the cam follower 37 is discharged from the discharge port 92 of the cam 9, the reading device 13 will maintain its position due to its own weight and the stopper 27. The reading device 13 then reads the information on the production instruction card 7 conveyed by the conveyor 1 while holding that position for a while. For example, as shown in FIG. 1, desired parts can be supplied onto the conveyor 1 from the parts storage shelf 100 (see FIG. 1) based on the read information.

Next, the cam follower 37 enters the introduction port 110 of the cam 11, is guided by the ramp 111, and when the cam follower 37 moves upward in FIG. 4, the rack 17 moves inward of the conveyor. This movement of the rack 17 causes the second
As shown in the figure (g), the pinion 15 rotates counterclockwise about the shaft 22. And in Figure 4,
When the cam follower 37 reaches the position S within the cam 11, the reading device 13 rotates to the retracted position S shown in FIG. Even if the conveyor 1 further advances and the cam follower 37 is discharged from the discharge port 112 of the cam 11, the reading device 13 will maintain its position due to its own weight and the stopper 25. Note that the production instruction card 7 completely passes through the reading device 13 while the cam follower 37 enters the cam 11 and reaches the ramp 111.

After the reading device 13 is held at the retracted position "A" in this manner, the workpieces on the slat conveyor 1 are conveyed.

Therefore, there is no risk of collision between the work 3, its jig, etc., and the reading device 13.

Further, in addition to the rack and pinion as the driving means, for example, a link mechanism or the like may be used.

Furthermore, the shape of the cam varies depending on the driving means used. Furthermore, although the card reading device is rocked, it may be moved up and down or left and right with respect to the conveyance means. In other words, any configuration may be used as long as the reading device can be moved between the reading position and the retracted position in synchronization with the conveyance of the workpiece.

〔Effect of the invention〕

According to the present invention, since the reading device can be moved to the reading position by retreating from or approaching the conveyance means in synchronization with the conveyance of the workpiece, it is possible to prevent collisions with the workpiece reading device. Since the drive means is driven using a cam, a predetermined position is detected by a limit switch, and based on a signal from the switch, an actuator such as an air cylinder is driven to move the reading device. Compared to the case where the time for the production instruction card to pass through the reading device is determined in advance and the on/off of the actuator is electrically controlled, the configuration is much simpler and less expensive, and the reliability is improved. Therefore, the present invention can greatly contribute to this type of production instruction device that requires allocation to each worker.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing one embodiment of the present invention, and Fig. 1 shows a state in which the cam follower and the cam are engaged.
Side view seen from line A, Figure 2 (B) is B in Figure 2 (4)
The view seen from the direction, Figure 3, is the same as Figure 2 (left side view of Xun, Figure 4).
The figure shows the details of the cam and rack pinion.0'' 1... Slat conveyor, 3... Work, 7...
Production instruction card, 9.11...Cam, 13...Card reader, 15...Pinion, 17...Rack,
19... Drive means, 37... Cam follower. Agent Tatsuyuki Unuma Figure 1

Claims (1)

[Claims] A production instruction card having information about a subsequent workpiece, which is conveyed in advance of the workpiece being conveyed by the conveying means, is placed between a card reading position close to the conveying means and a retreat position retracted from the conveying means. In a production instruction device that reads information with a movable card reader and outputs information according to the reading result, a first cam disposed on the conveyance means and a conveyance chitose subsequent to the first cam are provided. a second cam disposed; a driving means connected to the reading device to move the reading device between the reading position and the retracted position; and a tag fixed to the driving means for moving the conveying means. and a cam follower that sequentially engages the first cam and the second cam, and when the cam follower engages the first cam, the driving means moves the reading device to a reading position, A production instruction device, characterized in that, when the cam follower engages with the second cam, the driving means moves the reading device to a retracted position.